156 PROCEEDINGS OF THE AMERICAN ACADEMY. 



for the most part by myself in the Parque 3-de-Febrero, at Palermo, 

 a suburb on the river above Buenos Aires: in the grounds of the 

 Escuela Regional de Santa Catalina near the station of Llavallol, 

 where a small planted wood of various trees affords a good collecting 

 ground already familiar to mycologists, by name at least, from the 

 large number of fungi collected there and described by Prof. Carlos 

 Spegazzini, to whom I am much indebted for guiding me to this 

 locality as well as to the Isla de Santiago near La Plata, where I spent 

 two days collecting. Many hosts were also obtained in the grounds 

 of the Quinta Mackern, at Temperley, a town about ten miles south 

 of Buenos Aires, where I spent several weeks in the spring of 1906. 



To Dr. Propile Spegazzini I am greatly indebted for numerous 

 miscellaneous beetles which he kindly collected for me at La Plata 

 and in Tucuman, both during my visit and after my return to the 

 United States : to the Director of the Museo Nacional at Buenos Aires, 

 and to Dr. J. Brethes I am under obligations for various courtesies 

 and for the privilege of examining the entomological collections of the 

 Museum. For the determination of certain of the hosts I am indebted 

 to Mr. Samuel Henshaw, Dr. Fenyes, Dr. Max Bernhauer, M. Pic, 

 Dr. Malcolm Burr, Dr. Erno Csici and Col. Casey. To all these 

 gentlemen I desire to express my appreciation of their kindness in 

 thus assisting me. 



With the exception of perhaps a half dozen species, of which the 

 material is either too scanty or not in condition for description, the 

 following enumeration includes all the forms obtained. As will be 

 seen, a majority of them are hitherto undescribed, but it has seemed 

 desirable also to append a list of the species obtained which are 

 already known, and are listed below in alphabetical order. Of these 

 there are in all forty-nine species, while of the new forms sixty-eight 

 are included, with nine new generic types. 



Dimeromyces Anisolabis nov. sp. 



Male individual, quite hyaline. Receptacle consisting of four 

 superposed cells obliquely separated, except the upper; the basal 

 subtriangular, larger than the two subequal cells above it, of which 

 the upper always bears an antheridium, while a second may often 

 arise from the cell next below it. The antheridia rather stout and 

 short, the venter and stalk-cells about as long as the abruptly dis- 

 tinguished stout neck, which is bent abruptly outward distally. 

 Appendage consisting of three superposed cells subtended by a more 



